Java upload pictures of two ways

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一.MultipartFile

picture.transferTo(file);

// picture (MultipartFile type), file (File type) (upload path + filename)

二.ImageIO

BufferedImage image = new BufferedImage(width_pic, height_pic, BufferedImage.TYPE_INT_ARGB);

File file = new File(path);

ImageIO.write(image, "png", file);